Recording pressure-indicator.



A. S. LYHNE. RECORDING PRESSURE INDICATOR.

APPLIOATION TILED SI'iPT. 19, 1910.

Patented Junefi, 1911.

INVENTOI? fro/my WITNESSES:

a T ES PATENT OFFICE.

' mm s. mm, or namenroar, connnc'r'rcur, assieno a r0, WILLIAM a. ALLEN,

or I YONKEES, NEW YORK.

naconnme ranssuaamnrcaron. 1

. Application filed September 19,1910. Serial minute. i

:Toazzwamcm mm} W Be it known that I, Anxna S. Li'mvn, a citizen of the United Sta residing at Bridgeport, county of Fair-field, State of Connecticut, have lnvented an Improvement in Recording Pressure-Indicators, of which 'the following is a specification. a

This invention relates to pressure 1nd1ca-- tors adapted for general use and especiallyadapted for use inmeasuring the pressure in automobile tires. It, is of course well understood that in using this class of indicators, when the dust cap isremoved from the. fill pla over it, the pressureis transmitted to the indicator} mechanism and the pressure within the tire is indicated by a scale upon the indicator, varying means having been provided -for noting the pressure in connection with the scale. My present invention causes thelndicator to record the pressure so that the indicator may be applied to a tire where 'it would be too darl or impossible for any reason to read the scale, and -the pressure within thetire will be recorded by the indicator which may then be removed and the pressure indication read whenever and wherever it is convenient to read it.

With this and other objects in view I have devised the novel recording'pressure indicator which I will now describe, referring to the accompanying drawing forming a part of this specification and using reference characters to indicate the several parts:

Figure 1 is an elevation of in novel indi cator as in'use; Fig. 2 an elevation partly in lon 'tudinal section from a point of view at rig t angles to the point of view in-Fig. 1;

Fig. 3 a plan view andFig. 4 an elevation 'of the sleeve detached; and Figs. 5 and 6 dinally are respectively a plan view and elevation v of a variant form of sleeve detached.

10 denotes the case of the indicator which is tubular and is provided with a longitumovable inner tube 11, the upper end of which is closed b a plug 12, and which is normally retained in the retracted position by means of a pullin sprin 13 which is attached to the cap. s my resent invention is applicable to all indicators of this type and as the special construction of the indicator itself is wholly immaterial so far as the present invention is concerned, it is consideredunnecessary to describe the indinipple upon the tire and theindicator" cator in detail. The 'case of the indicatoris rovided with a slot 14 by the 'side of which s a pressure indicating scale indicated by 15. 16' denotes a sleeve which is adapted to slide upon the case and is preferably provid ed at its lower end with spring arms 17, the action any position in which it may be placed and which, in setting up indicators to compensate for variations in, the tension ofthe springs by bending the spring arms and causing them to press more or less tightly upon the case. n this way the assembler is enabled to test each indicator and by sure of the spring arms on the case to cause it toxrecord pressure with practical accuracy. In the preferred form of the invention as in Figs. 1 to etinelusive, with a longitudinal housing 18 which is open at the lower end and of which is to retain the sleeve at regulating the presthe sleeve is providedis provided at its upper I specification 6! Letters Patent. Patented June 6, 1911.

furthermore, enables the assembler end with a shoulder l9'which is engaged by a pin 20 which is I plug, extends through the slot and projects ar enough to engage the shoulder.

securely anchored in the 21 denotesa hp or lug which extends inward from the sleeve and engages the slot to retain the sleeve against other than longitudinal movement. In the present instance I have tegral with the sleeve; that is, a lip of the metal of the. sleeve is turned inward and engages the slot.

If preferred, the housing and shoulder may be dispensed with as in Figs. 5 and 6 and the pin may be caused to engage the lip which then serves the double purpose of retaining the sleeve against other than longioint of pro ecting rom the tudinal movement and also as a gngagement for a pin plug. p The operation is as follows: The dust on is removed from a tire nipple and the ind1- cator placed over it in the usual way, so that the air pressure within the tirc'is transmitted to the inner tube and plug which is raised against the sleeve co'-acts with the scale and indicates the pressure. When the indicator is removed from the nipple the spring will instantly return the inner tube position but the sleeve will remain in the position to which it has been carried by the pressure in the tire and the indication of the shown this lug as formed in-' and plng to their normalpower of the spring carrying the sleeve with it. 'The upper edge of the sleeve upon 'thesoale "canhe "read at the con- -venience of the operator.

My invention relates to thedetails of the. construction of the Sleeve 16 and I make no claim toha'ving inventedithe other features of thG gage; nor-do Iclaixn to be the in'ven .tor of the broad idea' 'of a plying to "a 'tire' pressure gage an indicator moving outward .withthe piston and remaining in indicating 101po'siti0n Whilelthe piston returns to its norma1positidn; 1 1

Having thus described my invention- 1 .'1.-A' device of the character described comprising a-slotted case havinga scale, a

.-,:sliding 'sleeve'rupo'n the case, spring arms upon-the sleeve, for the purpose-set forth, and'a-pressure-actuated plug within the case which engages the sleeve.

4 comprising; a slotted case having a scale, a

I sliding isleeve co-acting therewith and 'having a housing open at its lower end and provided'with a shoulder and a pressure-actuf ated plug having-1apin extending through F the slot and eng'agingthe shoulder;

' ""3'."A gage comprising erasing with a scale thereon, a sleeve" s llding oncasing. I

actuated means for moving said sleeveupon I 5; 'A'gage comprising a slotted casing with 'lug 'and servin to slide said sleeve over the saideasing.

a scale thereon, a sleeve sliding on said casing over said scale and having-inwardlydireeted "spring" lugsintegral therewith for "frictionallyengaging said ea'singande :1 lug angled through the slot in said casing; in'combination with pressure actuated means within said casing bearing upon said angled said casing, su stantially as described; W

" i In testimony whereof I aflix my signature inpresence of two witnesses.

f ANKER SI LYHNE:

-Witne'sses v H. K. BEACH,

Isaac L. Fnimrs. 

